ASRock 90-MXBN90-A0UAYZ

ASRock B650 Steel Legend WiFi 6E ATX Motherboard User Manual

Model: 90-MXBN90-A0UAYZ

1. Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of your ASRock B650 Steel Legend WiFi 6E ATX Motherboard. Designed for AMD Socket AM5 Ryzen 9000, 8000, and 7000 Series Processors, this motherboard offers robust features for high-performance computing, including DDR5 memory support, PCIe 5.0, and WiFi 6E connectivity.

ASRock B650 Steel Legend WiFi 6E Motherboard with packaging and accessories

Figure 1: ASRock B650 Steel Legend WiFi 6E Motherboard, including its retail packaging, Wi-Fi antennas, and documentation.

2. Setup and Installation

2.1 Safety Precautions

2.2 Component Overview

Top-down view of ASRock B650 Steel Legend WiFi 6E Motherboard

Figure 2: Top-down view of the ASRock B650 Steel Legend WiFi 6E Motherboard, showing the CPU socket, DDR5 DIMM slots, and M.2 slots.

Labeled diagram of ASRock B650 Steel Legend WiFi 6E Motherboard I/O and features

Figure 3: Detailed diagram highlighting the motherboard's rear I/O ports, power connectors, VRM design, DDR5 slots, PCIe slots, M.2 sockets, and audio features.

Labeled diagram of ASRock B650 Steel Legend WiFi 6E Motherboard heatsinks and fan headers

Figure 4: Diagram illustrating the placement of heatsinks (XXL Aluminum VRM, Multi-Layer M.2, Chipset) and various fan/pump headers on the motherboard.

2.3 Physical Installation Steps

  1. Install CPU: Open the CPU socket lever, align the CPU with the triangle marker, gently place it into the socket, and close the lever.
  2. Install CPU Cooler: Follow the cooler manufacturer's instructions for installation.
  3. Install Memory (RAM): Open the clips on both ends of the DDR5 DIMM slots. Align the memory module with the notch in the slot and press down firmly until the clips snap into place.
  4. Install M.2 SSDs: Locate the M.2 sockets. For Blazing M.2 (PCIe Gen5x4) and Hyper M.2 (PCIe Gen4x4), remove the heatsink, insert the M.2 SSD at an angle, and secure it with the provided screw or latch. Reattach the heatsink.
  5. Install Graphics Card (GPU): Insert the graphics card into the PCIe 5.0 x16 slot, ensuring it clicks into place. Secure it with a screw to the chassis.
  6. Connect Power Supply: Connect the 24-pin ATX power connector and the 8+8 pin 12V power connectors to the motherboard. Connect power to the graphics card if required.
  7. Connect Storage Drives: Connect SATA drives to the SATA3 6.0 Gb/s ports.
  8. Connect Front Panel Cables: Connect the power switch, reset switch, USB ports, and audio headers from your PC case to the corresponding pins on the motherboard.
  9. Install Wi-Fi Antennas: Screw the included Wi-Fi antennas onto the connectors on the rear I/O panel.

3. Operating Instructions

3.1 Initial Boot and BIOS/UEFI Setup

3.2 Driver Installation

After installing your operating system (Windows 10 or Windows 11), install the necessary drivers for optimal performance. ASRock provides an Auto Driver Installer for convenience. Key drivers include:

4. Maintenance

5. Troubleshooting

ProblemPossible CauseSolution
System does not power on.Loose power connections, faulty PSU, incorrect front panel wiring.Check all power cables (24-pin, 8+8 pin CPU, GPU). Verify front panel power switch connection. Test PSU.
No display output (no POST).Incorrectly seated RAM/GPU, faulty component, BIOS issue.Reseat RAM modules (try one at a time). Reseat graphics card. Clear CMOS. Use BIOS Flashback if necessary.
Operating system not detected.Incorrect boot order, faulty storage drive, OS corruption.Check boot order in BIOS/UEFI. Verify storage drive connections. Reinstall OS if necessary.
Network connectivity issues.Missing/outdated LAN/WiFi drivers, faulty cable/antenna.Install/update LAN/WiFi drivers. Ensure Wi-Fi antennas are securely attached. Check Ethernet cable.

6. Specifications

7. Warranty and Support

7.1 Warranty Information

This ASRock motherboard comes with a manufacturer's warranty. Please refer to the warranty card included in your product packaging or visit the official ASRock website for detailed warranty terms and conditions specific to your region.

7.2 Technical Support

For technical assistance, driver downloads, BIOS updates, or further inquiries, please visit the official ASRock support website or contact ASRock customer service. You may also refer to the User Manual (PDF) or Installation Manual (PDF) provided by ASRock.

If you have questions about the product purchased on Amazon, you may contact the seller, ASRock USA, through the Amazon platform.